Abigail is in the Morse Society database. She is a descendant of the Anthony Morse line. Date of birth info from that database.

1850 Craftsbury Vermont census shows Abigail, age 67, living with James and Abigail Gardner and born in Massachusetts (sic).

Vermont death record (probably taken from tombstone) says she was wife of William, died at age 73 years and 8 months (no days indicated). 1856-10-19 minus 73-08-00 = 1783-02-19. She is buried in the cemetery at North Craftsbury.

• Married: 16 Jun 1800 in Norwich, Vermont
• Note:

  [begin quote Norwich Vermont town records 1761-1895 Vol I bottom of Page 292]
  
  State of Vermont Windsor County
  Be it remembered that at Norwich in the County aforesaid on this 16th day of November in the year of our Lord 1800 William Robins and Nabby Morse both of said Norwich were Duly Joined in Marriage by me.
  
  Lyman Potter Minister
  
  [end quote]
  
  Marriage in VT VR is 16 Nov 1800, but George Robbins genealogy by Isaac Gilbert Robbins and the Morse Genealogy of 1903/05 both have 16 Jun 1800. June makes more sense, since first child, Ansel, was born in Feb 1801.

1. Ansel Percival Robbins b: 19 Feb 1801 in Norwich, Vermont
2. Martha Robbins b: 17 Sep 1802 in Thetford, Vermont
3. Almira Robbins b: 07 Feb 1804 in Thetford, Vermont
4. William Robbins , Jr. b: 13 Apr 1806 in Norwich, Vermont
5. John Robbins b: 17 Nov 1808 in Norwich, Vermont
6. Infant Robbins b: 1810 in Norwich, Vermont
7. James Madison Robbins b: 07 May 1812 in Norwich, Vermont
8. Thomas Jefferson Robbins b: 07 May 1812 in Norwich, Vermont
9. Waterman Ainsworth Robbins b: 07 Dec 1814 in Norwich, Vermont
10. Job Morse Robbins b: 22 Jun 1817 in Peacham, Vermont
11. Abigail Morse "Abba" Robbins b: 20 Jan 1819 in Peacham, Vermont
12. Simon Blanchard Robbins b: 18 May 1820 in Peacham, Vermont